Temperature indicator or alarm.



- L. HUBERMAN. TEMPERATURE INDICATOR 0R ALARM.

, APPLIOATION FILED DBO.'17, 1908 1 68.

Patented May 23, 1911.

a gnaw/Hi0 wi/bnwoco tionsfbeing diagrammatically shown.

5' I I max LOUIS Horseman, or nos-enemas, cALIroRivIa To all whom it may concern: l v Be it known that I, MAX L. HU13ERMAN, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles andSt-ate of California, have invented a new and useful Temperature Indicator or Alarm, .of which the following is a specification.

This invention relates to means for indi I eating or eiiecting the operation of an alarm in case the temperature .at a particular place rises above or falls below predetermined degrees, and while the device is especially use ful for incubators or the like, its use is by no means limited thereto.

15 The principal objectof the present invention is 'to provide a simple compact struc-' ture, which can be cheaply produced and readily installed by an 1nexperienced' ;per-

son, yet is entirely accurate and is adjust- 0 able .so that it may be'easily altered to 0perate at different degrees of temperature.

Another and important objectis to provide an electrical alarm, and means whereby when the alarm is sounded, the same canbe 25 out 01f without, however, cutting the alarmentirely out from the system, so that if therearrangement of parts is overlooked from any cause, the system will still be partly operative.

' The preferred embodini ent ot the inven tion is illustrated in the accompanying drawings, wherein f Figure 1 is a view in elevation of the mechanism, the-yarious electrical conpecig. 62 is a longitudlnal sectional view through the contact mechanism.

Similar reference numerals designate corresponding parts in all the figures of the drawings. 4

Inthe embodiment illustrated, a support is employed in The form of a bracket comprisin sections. *One of these sections consists o a main supporting bar 3 having oppositely ofiset terminal portions 4' and I The portion 4 is-a'dapte'd to be placed against a suitable support to whichit is secured by screws 6 or-other fasteners. The other section comprises an angle bar, one arm 7 of 5 whichis located against the offset terminal.

portion 5, to which it is secured by screws 8. The-.two sections are, however, electrically insulated, as shown at 9.

Mounte "on the main bar 3, is a thermo- 55 static devlce ,preferably in the form of a cliaphragni 10, and secured as shown at 11 TEMPERATURE mmcaro'ni on. ALARM.

Specification of Letters Patent. 1 Patented May. 23, '1911. Applicationfiled December 17,1908. Serial 110,468,001.

to the' upper side of said diaphragm, is a contact bar 12 that is insulated from the 'diaphragm, but is supported solely thereby. The diaphragm 10 has upwardly and downwardly extending lugs 10' passing through apertures 3 and 12 of the bracket 3 and bar 12, and on the lugs are nuts 11* forfas- -tening the parts together, there being bush- .ings 11 of insulation around the lugs for phragm. The bar 12 can be swung around bar out of alinement with the fixed contacts of the device when the apparatus is not in use, to thus prevent waste of current by engagement of the bar 12 .with either of said contacts. The free end of the bar 12 has a plug 13 of suitable contact material. Threaded through he different bracket sections, are contact screws lei having platinum or other suitable points 15 disposedon opposite sides of and'in the path of movement Lock nuts 16, threaded on the screws, serve to hold them in their adjusted relation. \Vith this arrangement, it will be evident that if the thermostatic device expands under the. influence of heat, the bar'will be elevated so that the plug will engage the upper contact screw, and on the other hand it will then engage the lower screw. The decan be alteredby varying the positions of the inner ends of said screws.

- An alarm or indicator of any suitable type may be employed. Thus inthe present emwhich has an electrical connection 18 with a suitable source of electrical energy, shown diagramnuitically at 19. This bell also has an electrical connection 20 with the contact bar 12. An electric switch 21 is employed, comprising asuitable base'22 provided with spaced contact points 23, and a s\\-'i1 ging nndtancously engage both of the contact points 23 as shown in Fig. 1, or that can be swung to a position to engage either independently of the other. Stop pins 25, carried. by the base, limit the swinging moveuncnt of .the .arm so that said arm must alwayshe in-cuga ement with at,least one of the contact points. It will be'observed by reference to Fig 1 that one. of sai d contact points 23 is 'electrically connected, as

preventing a short circuit through the dia-' arm 2-} that is movable to a position to si-- on the upper lug as a pivot in throwing the of the, plug 13, and consequently of the bar.

saiddevice contracts suiticiently, the plug grees of heat at which the contacts take place bodiment, an electpic bell 17 is disclosed,

- 1 shown at 26 with the ma bracket section a,

and consequently with the' lower contact screw,- while the otherfontact point 23 is electricall connected as illustrated at 27 to the ot er bracket section 7 and conse- .quentlyto-the upper contact'screw.

The operation of the structure-is substanfully as follows, The cbntact mechanism is secured at theplace where it is desiredfto.

know of any material change in the temperature'; -For instance it can be readily secured at any desired point within an in cubator. The screws 14 areadjustcd to the points desired, and the switch arm 24: is placed in its central position in engagement with both of the contact points 23. As long as the temperature remains at the desired degree, the bar 12 is out of engagement with both ofthe screws 14, but if'the temperature rises. above or falls below the desired degree, it will be evidentithat said her 12 will electrically engage one of the screws, thereby closing the circuit throughthe signal or alarm-l'f'and efi'ecting its operation. The person whose attention is called to the mat- V ter moves the switch in the proper direction to break the circuit, and of course makes the necessary alteration in the heating means.

He shouldthen' return the switch arm 24 to its central position, but if through oversight,

' for for any other reason, itshould be overlooked, itwill be evident that inasmuch as the switch arm is still in engagementwith I so ,quainted with one of the contact points, the system will be partly operative. Moreover, it will be in engagement with the point that is electrically connectedto the screw that is the most apt to beengaged by the contact bar. For

.instance,ii f' the temperature rises above the desiredfdegree, the bar 12 will consequently be raised soas to close the circuit through the upper screw. The operator therefore switches the arm 24 to the 'contact point 23 that is connected to the, lower arm, and-if the device is inan incubator, lowers the therefore that it will be turned too low, in which case if the switch arm 24; is forgot ten when the temperature falls below the desired degree, the circuit will be closed through the lower screw 14, and the alarm will a in be operated. It will be evident that t is structure is very simple, that it can be cheaply manufactured, and readily installed by a erson not thoroughly ace ctricity. Moreover it can be laced in incubators already in use, as we] as in new structures,

From the foregoing, it is thought that the construct-ion, operation and many advantages of the herein described invention will be apparent to those skilled in th c art Without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construcvantages of the invention.

Havin thus fully described m invention, if.

what I c aim as new, and desire to secureby Letters Patent, is:

1. In an alarm mechanism of the charac-- I ter set forth, the combination ofa support-f" ing bracket having an aperture, a contact bar spaced from the supporting bracket and th with the contacts and said bar for complet-' ing a circuit by engagement of the bar with either contact.

2. In alarm mechanism of the character setforth, the combination with a supporting bracket comprising a main bar havcured to one of the offset ends and insulated a thermostatic diaphragm 'mounted on the ing angular offset ends, of an angle bar sea main bar and insulated'therefrom, a contactv i bar connected tothe thermostatic diaphragm and insulated therefrom and movable bodily therewith, and contact screws threaded in the said 0 enings of the main bar and angle bar and isposedin the of opposite sides of the contact bar, said contact bar being also movable to a positionout of alinement with the screws.

3. Thecombination of support, a therand provide on its upper side with'an up: standing lug, a contact'bar fitted over the 1.05 I 'mostatic dia hragm secured on said support I flame ofthe beaten. The probabilities are said lug and adapted to move laterally thereon, means for securing the said bar rigidly on the said lug, a-contact arrangedin the path of movement of the free end of.

the bar, and an electrical alarm circuit including the said bar and the said contact.

In testimony, that'I claim the-foregoing as my own, I have hereto ailixed my signature in the presence of two witnesses.

MAX LOUIS HUBERMAN.

Witnesses T os. A. STIRLING, ANNA SCHAFFER.

. w 3 tron, maybe resorted to without departing: from the spirit or sacrificing anyof the lid-j I 1. path of movement 

